I was watching this youtube vidoe about making a dish out of an greater amberjack fish (kampachi) and the cook said this:
鰤ほどは痛むスピードが遅いですけど
i think he wants to say that the greater amberjack fish spoils slower than the 鰤 fish but if that was the case should not he have said 早くない instead ? https://youtu.be/r8peOCisk94?t=420